Thermostatic automatic regulator for dampers.



J. A. BUNCH.

THERMOSTATIO AUTOMATIC REGULATOR FOR DAMPERS. AIPLIGATION FILED MAY 1, 1914.

1,125,810. Patented Jan.19,1915.

JOHN A. BUNCH, OF ROCKCREEK, OREGON.

THERIVIOSTATIC AUTOMATIC REGULATOR FOR DAMPERS.

Specification of Letters Patent.

Patented Jan. 19. 1915.

Application filed May 1, 1914. Serial No. 835,753.

To all whom it may concern Be it known that 1, JOHN A. BUNCH, a citizen of the United States, residing at Rockereek, in the county of Gilliam and State of Oregon, have invented a new and useful Thermostatic Automatic Regulator for Dampers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will on able others skilled in the art to which it appertains to make and use the same.

This invention relates to a new and useful automatic thermostatic regulator for dampers, for controlling the draft through the smoke flue of a stove or the like.

One of the features of the invention is the provision of a thermostat comprising a pair of vibrating diaphragms, one connected to a stationary arm of a support of the flue, whereas the other is connected to a pivoted arm of said support, said pivoted arm having adjustable connections with the damper, there being a counterbalance r poise-weight connected to the pivot rod of the damper to hold the damper in an open or partially opened position.

The details of construction may be subjected to alterations, falling within the scope of what is claimed.

The invention comprises further features and combination of parts, as hereinafter set forth, shown in the drawings and claimed.

In the drawings :Figure l is a transverse sectional view of a smoke flue of a stove or the like, illustrating the damper and showing the thermostatic regulator in elevation as applied. Fig. 2 is a view in side elevation of the improved smoke flue with the regulator applied. Fig. 3 is a sectional view on line 3-3 of Fig. 1.

Referring to the drawings, 1 designates a smoke flue, in'bearings of which a rocking rod 2 having a damper 3 is journaled. The damper is connected to the rod by the plates 4, so as to move or IOl k as one body, there being struck up or swaged portions 5 to prevent movement of the damper relative to the rod axially.

Secured to one end of the rod 2 as at 6 is a collar 7 having an arm 8, laterally of which a rod 9 extends, and on which rod'9 a counter-poise or balance weight 10 is adjustably mounted as shown in Figs. 1 and 2. By means of the set screw 11 the weight may be held adjusted in difierent positions upon the rod 9.

Riveted or otherwise secured at 12 to one side of the flue is a support 13 having a bracket arm 14 carried thereby. This bracket arm and the pivot bracket 15 are secured to a slide 16, the pivot bracket being integral therewith, while the arm is secured in place by the screw 17. The usual form of thermostat 18 is provided, one diaphragm of which has a lug 19, through which the screw 20 passes, thereby securing the lug to the arm 14. The other diaphragm of the thermostat has a bifurcated lug 21, in the bifurcation of which the lever 22 is pivoted at 23. This lever at one end is pivoted at 24 to the pivot bracket 15, whereas the other end of the lever is pivoted at 25 to the link 26, which is constructed with the segmental portion 27 having a series of notches 28, in any one of which the looped or hooked end 29 of the link rod 30 may engage. The link rod in turn has a hook 31 engaging in an eye in the arm 8 of the sleeve or collar 7.

As indicated in Figs. 1 and 2 it will be observed that the damper is arranged in a partially open position, shown in dotted lines, allowing the products of combustion to pass through the flue, which will enable the fire in the stove (not shown) to have suitable draft. As the heat about the flue increases, the thermostat ex ands moving the lever in the direction of t e arrow a, pulling upon the arm 8 of the collar 7 through the adjustable connections 27, 28 and 30, thereby closing the damper, against the counter-poise or balance weight 10. As the heat decreases the thermostat will contract, permitting the balance or counter-poise or balance weight to open the damper. Bywarranging the weight farther toward the free end of the rod 9, will necesitate'a great amount of heat to expand the thermostat. By virtue of the adjustable connections between the damper and the thermostat, the damper may be arranged indifferent positions, prior to the actuation of the automatic means. Projecting from the collar 7 is a handle or arm or rod 33, which may be used for manually manipulating the damper, or may be held in one hand to hold the damper in a certain position, while arranging the adjustable connection to the thermostat and the arm 8.

The invention having been set forth, what is claimed as new and useful is In combination with an exhaust flue having a damper therein, the pivot rod spindle thereof being extended through the flue at one end and provided with an arm having a counter-poise weight, a support carried by the flue and provided with guides, a slide adjustable in said guides, a bracket on one end of the slide and an arm at the other end, a thermostat connected to the arm of the slide, a lever pivoted to the bracket of the slide and having pivotal connections with the thermostat upon the face opposite the face connected to the arm, a link having a segmental portion pivoted to the free end of the lever, said segmental ortion having notches, and a rod connecte at one end to any one of said notches and having its other end connected to the arm of the damper.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

. JOHN A. BUNCH. Witnesses:

L. E. CLARK, CLAUD .C. CLARK. 

